What are the original yoga texts collectively known as?

The correct answer is the term that refers to a philosophical system derived from the Vedas, which are considered the oldest scriptures in Hinduism. These texts explore the concepts of duty, morality, and the nature of reality, comprising a significant intersection with yogic philosophy. Vedanta, meaning "the end of the Vedas," seeks to provide insight into the ultimate purpose of human existence and serves as a foundational aspect of yoga philosophy.

The other options represent important texts within the context of yoga and Hindu philosophy but do not collectively refer to the original yoga texts. The Upanishads are philosophical writings that explore the nature of reality and the self, and while they are important, they are not a collective term for all original yoga texts. The Bhagavad Gita is a conversation between Prince Arjuna and Lord Krishna, addressing the moral dilemmas of war and duty while incorporating yogic principles, but again, it is not a collective term. The Gheranda Samhita is a later text focused on hatha yoga practices but does not encompass the original texts as a whole.